Page 354 - Lindens Handbook of Batteries

LiTHiUM PriMAry BATTerieS 14.19

14.5.3 Performance
Voltage. The open-circuit voltage of the Li/SO battery is 2.95 V. The nominal voltage is usually
2
specified as 3 V. The specific voltage on discharge is dependent on the discharge rate, discharge tem-
perature, and state-of-charge; typical working voltages range between 2.7 and 2.9 V (see Figs. 14.9,
14.10, and 14.12). The cutoff voltage, the voltage by which most of the battery capacity has been
exhausted, is typically 2 V.

3.0

2.8

2.6
Cell voltage, V 2.4

2.2

2.0

1.8
0 0.1 0.2 0.5 1 2 5 1020 50 100 200 500 1K 2K 5K 10K
Hours of service
(a)
FIGURE 14.9a Typical discharge characteristics of standard-rate Li/SO battery at various
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loads at 20°C.

2.90
2.80
2.70

2.60
Voltage, V 2.50

2.40
2.30
2.20
2.10 3A 1A 0.5A 1.5 mamp
7.5 AH 7.7 AH 8.0 AH 8.2 AH
2.00
0.00
0.1 1 10 10 2
Hours
(b)
FIGURE 14.9b Discharge characteristics of high-rate Li/SO D-size battery at four rates at 23°C.
2